EP0861997A1 - Power tool with lubricated angle drive - Google Patents
Power tool with lubricated angle drive Download PDFInfo
- Publication number
- EP0861997A1 EP0861997A1 EP98850023A EP98850023A EP0861997A1 EP 0861997 A1 EP0861997 A1 EP 0861997A1 EP 98850023 A EP98850023 A EP 98850023A EP 98850023 A EP98850023 A EP 98850023A EP 0861997 A1 EP0861997 A1 EP 0861997A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- receptacle
- gear casing
- output shaft
- power tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0463—Grease lubrication; Drop-feed lubrication
- F16H57/0464—Grease lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0493—Gearings with spur or bevel gears
- F16H57/0495—Gearings with spur or bevel gears with fixed gear ratio
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S173/00—Tool driving or impacting
- Y10S173/03—Lubrication
Definitions
- the invention relates to a power tool of the type having a rotation motor drivingly connected to an output shaft via an angle drive.
- the invention concerns a power tool of the above type in which the angle drive comprises a gear casing, a bevelled pinion gear connected to the motor, a bevelled crown wheel connected to the output shaft and intermeshing with the pinion gear, and a lubricant dispensing means located in the gear casing and arranged to provide a lubricant to the angle drive.
- the angle drive disclosed in this patent comprises a absorbent sleeve element immovably mounted in the gear casing surrounding the output shaft.
- This sleeve which comprises two portions of different absorption properties, is initially saturated with a lubricant and arranged to meter that lubricant onto the gear teeth of the crown wheel by gravitation.
- a drawback with this device is that a lubricant with comparatively low viscosity has to be used. This means in turn that also when the tool is temporarily out of use or stored for a shorter or longer period of time the lubricant is dispensed continuously from the absorbent sleeve. Thereby, the lubricant may be gathered somewhere in the gear casing where it will not be effective to lubricate the gear when the tool is put back in use.
- Fig. 1 shows a longitudinal section through a power tool angle drive head according to the invention.
- Fig. 2 shows a perspective view of the lubricant reservoir comprised in the angle drive shown in Fig. 1.
- the power tool shown in Fig.1 comprises a housing 10, a rotation motor (not shown), and an angle gear 11.
- the latter is located in a gear casing 12 attached to the housing 10 and includes a pinion shaft 13 drivingly coupled to the motor, a pinion gear 14, and an output shaft 16.
- a crown wheel 17 is locked to the output shaft 16 by a key 18 and intermeshes with the pinion gear 14.
- the output shaft 16 is journalled in an rear bearing 19 and a forward bearing 20, whereof the rear bearing 19 is supported in a socket portion 22 in the gear casing 12 and the forward bearing 20 is axially supported by a threaded ring element 23 forming an end closure of the gear casing 12.
- the ring element 23 has a central opening 24 through which a drive end 26 of the output shaft 16 protrudes from the gear casing 12, and a seal ring 27 is carried on the ring element 23 for sealing off the opening 24 around the output shaft 16.
- the drive end 26 of the output shaft 16 is adapted to carry any standard type working implement, for instance a grinding tool.
- a cup-shaped lubricant receptacle 28 having an end wall 29 and a peripheral side wall.
- the latter comprises a cylindrical section 30 and a flat section 31.
- the end wall 29 is flat and has a circular opening 32 through which the output shaft 16 extends, .
- the receptacle 28 is intended to be located with the end wall 29 close to the crown wheel 17 and with the flat side wall section 31 oppposite the end surface of the pinion gear 14. See Fig. 1.
- the cylindrical side wall section 30 is divided by slots or openings 35a, 35b and 35c into four axially directed tounges or fingers 36a, 36b, 36c and 36d, each formed at its free upper end with an external circumferentially directed rib 38.
- the latter is intended to cooperate by a snap-action with a circumferential shoulder 39 in the gear casing 12 to axially lock the receptacle 28 in the gear casing 12.
- the shoulder 39 is formed by a partcircumferential groove 40 in the gear casing 12.
- the flat side wall section 34 is not connected to the adjacent tounges 36a, 36d of the cylindrical wall section 30, but leaves the tounges 36a, 36b free to be elastically bent to ensure the snap-action between the ribs 38 and the shoulder 39.
- the slots 35a-c of the cylindrical side wall section 30 are fully covered by a surrounding inner wall 41 of the gear casing 12 to make the receptacle 28 fully cup-shaped.
- the receptacle 28 may be filled up with a lubricant.
- the receptacle 28 is provided with a small size opening 43 through which lubricant is dispensed mainly by gravity onto the crown wheel 17.
- an agitator element in the form of a freely movable metal ball 44. Due to vibrational and other movements of the tool housing 10 and gear casing 12 during operation of the tool, the ball 44 moves around in the receptacle 28 agitating the lubricant and makes the lubricant move in several directions, inter alia in the direction of the outlet opening 43.
- the lubricant is dispensed from the receptacle 28 via the opening 43 onto the gear teeth of the crown wheel 17 to lubricate the angle gear 11.
- the lubricant does not stay on the gear teeth but is thrown off by centrifugal action and is also separated by the rather violent agitation of the gear teeth into its heavier and lighter components.
- the heavier components, which have a higher viscosity, are deposited on the walls of the gear casing 12, whereas the lighter components, which have a lower viscosity, tend to leak out from the gear casing 12 past the output shaft seal ring 27.
- the lubricant receptacle 28 may be made of any suitable material like sheet metal or plastic, and the side wall tounges 36a-d of the receptacle 28 may be varied in number and configuration.
- the invention restricted to a device having an agitator element in the form of a ball 44.
- There may also be more than one agitator element.
- There may also be more than one lubricant outlet opening 43. Accordingly, it is obvious that the number and configuration of the agitator element as well as the location and size of the lubricant outlet may be varied in response to the viscosity properties of the actual type of lubricant.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Gear Transmission (AREA)
- Portable Power Tools In General (AREA)
- Percussive Tools And Related Accessories (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
Fig. 1 shows a longitudinal section through a power tool angle drive head according to the invention.
Fig. 2 shows a perspective view of the lubricant reservoir comprised in the angle drive shown in Fig. 1.
Claims (7)
- Power tool with a rotation motor, a rotating output shaft (26) and an angle drive (11) connecting said motor to said output shaft (26), said angle drive (11) including a gear casing (12), a pinion gear (14) connected to said motor, a crown wheel (17) connected to said output shaft (26), and a lubricant dispensing means (28, 44) located in said gear casing (12) and arranged to provide a lubricant to said angle drive (11),
characterized in that said lubricant dispensing means (28, 44) includes a lubricant receptacle (28) immovably supported in said gear casing (12),said receptacle (28) comprising a peripheral side wall (30, 31) extending substantially in parallel with said output shaft (26) and an end wall (29) disposed substantially transversely to said side wall (30, 31) and to said output shaft (26),said end wall (29) being located close to said crown wheel (17) and including a lubricant outlet opening (43),at least one agitator element (44) which is freely movable within said receptacle (28) and arranged to agitate said lubricant under the action of tool operation related vibratory movements of said gear casing (12), thereby, fascilitating spreading of said lubricant toward said outlet opening (43). - Power tool according to claim 1, wherein said gear casing (12) is provided with a laterally extending passage means (42) for enabling refilling of said receptacle from an external lubricant source.
- Power tool according to claim 2, wherein said peripheral side wall (30, 31) of said receptacle (28) is provided with a lubricant inlet opening (35b), and said passage means (42) of said gear casing (12) is located so as to coincide with said lubricant inlet opening (42).
- Power tool according to anyone of claims 1 - 3, wherein said at least one agitator element (44) comprises a metal ball.
- Power tool according to anyone of claims 1 - 4, wherein said receptacle (28) is cup-shaped and having its peripheral side wall (30, 31) divided by slots (35a-c) into a number of axially directed tounges (36a-d) each formed at its free end with an external circumferentially dierected rib (38) intended for cooperation by snap-action with a corresponding shoulder (39) in said gear casing (12) to axially lock said receptacle (28) in said gear casing (12).
- Power tool according to claim 5, wherein one of said slots (35b) forms said lubricant inlet opening.
- Power tool according to anyone of claims 3 - 6, wherein a lubricant supply fitting (45) is mounted in said gear casing passage means (42), said fitting (45) extends into said lubricant inlet opening (35b) of said receptacle (28) to thereby form a rotation lock means for said receptacle (28).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9700579 | 1997-02-19 | ||
SE9700579A SE509564C2 (en) | 1997-02-19 | 1997-02-19 | Engine tool with greased angle gear |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0861997A1 true EP0861997A1 (en) | 1998-09-02 |
EP0861997B1 EP0861997B1 (en) | 2001-08-08 |
Family
ID=20405848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98850023A Expired - Lifetime EP0861997B1 (en) | 1997-02-19 | 1998-02-18 | Power tool with lubricated angle drive |
Country Status (5)
Country | Link |
---|---|
US (1) | US6109366A (en) |
EP (1) | EP0861997B1 (en) |
JP (1) | JP4404387B2 (en) |
DE (1) | DE69801293T2 (en) |
SE (1) | SE509564C2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1364748A1 (en) * | 2002-05-22 | 2003-11-26 | Atlas Copco Tools Ab | Portable power tool with grease lubricated angle gear drive |
EP1364747A2 (en) * | 2002-05-22 | 2003-11-26 | Atlas Copco Tools Ab | Portable power tool with rotation motor and grease lubrificated angle drive |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10045618A1 (en) * | 2000-09-15 | 2002-04-04 | Bosch Gmbh Robert | Machine tool with a room with lubricant and a pressure compensation device of the room |
DE10045620A1 (en) * | 2000-09-15 | 2002-04-04 | Bosch Gmbh Robert | Machine tool with a room with lubricant and a pressure compensation device of the room |
SE521348C2 (en) * | 2000-11-15 | 2003-10-21 | Atlas Copco Tools Ab | Portable motor driven tool with a grease lubricated gearbox |
US8047302B2 (en) * | 2001-12-21 | 2011-11-01 | Wacker Neuson Produktion GmbH & Co. KG | Drilling and/or striking hammer with a lubricating device |
DE10163278A1 (en) * | 2001-12-21 | 2003-07-10 | Wacker Construction Equipment | Hammer drill and / or percussion hammer with a lubrication device |
EP1327497B1 (en) * | 2002-01-10 | 2006-05-31 | Black & Decker Inc. | Gear case |
US6880223B2 (en) | 2002-04-25 | 2005-04-19 | Milwaukee Electric Tool Corporation | Grease slinger |
SE523780C2 (en) * | 2002-05-22 | 2004-05-18 | Atlas Copco Tools Ab | Portable power tool with grease lubricated angular gear whose grease-filled gearbox is divided by a disc-shaped element |
DE10230991A1 (en) * | 2002-07-10 | 2004-02-12 | Robert Bosch Gmbh | Tool holder for a machine tool |
AU2003279955A1 (en) * | 2002-10-10 | 2004-05-04 | Snap-On Technologies, Inc. | Lubrification system for impact wrenches |
EP1728596B1 (en) * | 2005-06-02 | 2009-02-11 | Makita Corporation | Power tool |
JP5059313B2 (en) * | 2005-10-07 | 2012-10-24 | 日本ニューマチック工業株式会社 | Air tools |
US7520341B1 (en) | 2007-09-26 | 2009-04-21 | Devall Donald L | Drill head assembly |
DE102007050549A1 (en) * | 2007-10-23 | 2009-04-30 | Robert Bosch Gmbh | Hand tool |
JP5073449B2 (en) * | 2007-10-25 | 2012-11-14 | 株式会社マキタ | Power tool housing |
US20090272556A1 (en) * | 2008-05-05 | 2009-11-05 | Ingersoll-Rand Company | Angle head and bevel gear for tool |
US7886840B2 (en) * | 2008-05-05 | 2011-02-15 | Ingersoll-Rand Company | Motor assembly for pneumatic tool |
US20110139474A1 (en) * | 2008-05-05 | 2011-06-16 | Warren Andrew Seith | Pneumatic impact tool |
DE102008032791A1 (en) | 2008-07-11 | 2010-01-14 | Wacker Neuson Se | Drilling and / or hammer with relubrication device |
JP5243294B2 (en) * | 2009-02-18 | 2013-07-24 | 日東工器株式会社 | Rotating drive air tool |
US9592600B2 (en) | 2011-02-23 | 2017-03-14 | Ingersoll-Rand Company | Angle impact tools |
US8925646B2 (en) | 2011-02-23 | 2015-01-06 | Ingersoll-Rand Company | Right angle impact tool |
DE102011050191A1 (en) * | 2011-05-06 | 2012-11-08 | Aesculap Ag | Surgical handpiece |
JP5816071B2 (en) * | 2011-12-13 | 2015-11-17 | コベルコ建機株式会社 | Construction machine drive |
TWM433931U (en) * | 2012-01-16 | 2012-07-21 | Basso Ind Corp | Right angle head pneumatic tool |
JP2013144340A (en) * | 2012-01-16 | 2013-07-25 | Makita Corp | Electric power tool |
TWM433930U (en) * | 2012-01-17 | 2012-07-21 | Basso Ind Corp | Packing device for right angle head impact wrench |
JP2013151055A (en) | 2012-01-26 | 2013-08-08 | Makita Corp | Striking tool |
US9022888B2 (en) | 2013-03-12 | 2015-05-05 | Ingersoll-Rand Company | Angle impact tool |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1911612A1 (en) * | 1969-03-07 | 1970-09-24 | Eickhoff Geb | Bevel gear with vertical output shaft |
US3719254A (en) * | 1971-11-10 | 1973-03-06 | Dotco Inc | Lubricated angle drive attachment for air operated tool |
US4403679A (en) * | 1981-04-01 | 1983-09-13 | Cooper Industries, Inc. | Angle drive lubricator |
DE3529028A1 (en) * | 1984-09-07 | 1986-03-20 | Steyr-Daimler-Puch Ag, Wien | Lubricating device for a motor-vehicle gearbox |
EP0291370A1 (en) * | 1987-05-12 | 1988-11-17 | Automobiles Peugeot | Supervisory device for the pressure of an oil pump driven by the transmission of an automotive vehicle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6043278B2 (en) * | 1977-02-04 | 1985-09-27 | 芝浦メカトロニクス株式会社 | hammer drill |
US4190116A (en) * | 1978-05-03 | 1980-02-26 | Black Diamond Service Company, Inc. | Mine roof bolter |
US4416337A (en) * | 1979-06-08 | 1983-11-22 | Albert Phillips | Drill head assembly |
JPS5859886U (en) * | 1981-10-19 | 1983-04-22 | 株式会社小松製作所 | drifter device |
US5293959A (en) * | 1992-09-21 | 1994-03-15 | Ingersoll-Rand Company | Low pressure system lubrication for a jackhammer |
-
1997
- 1997-02-19 SE SE9700579A patent/SE509564C2/en not_active IP Right Cessation
-
1998
- 1998-02-17 US US09/025,065 patent/US6109366A/en not_active Expired - Fee Related
- 1998-02-18 DE DE69801293T patent/DE69801293T2/en not_active Expired - Fee Related
- 1998-02-18 EP EP98850023A patent/EP0861997B1/en not_active Expired - Lifetime
- 1998-02-19 JP JP03777998A patent/JP4404387B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1911612A1 (en) * | 1969-03-07 | 1970-09-24 | Eickhoff Geb | Bevel gear with vertical output shaft |
US3719254A (en) * | 1971-11-10 | 1973-03-06 | Dotco Inc | Lubricated angle drive attachment for air operated tool |
US4403679A (en) * | 1981-04-01 | 1983-09-13 | Cooper Industries, Inc. | Angle drive lubricator |
DE3529028A1 (en) * | 1984-09-07 | 1986-03-20 | Steyr-Daimler-Puch Ag, Wien | Lubricating device for a motor-vehicle gearbox |
EP0291370A1 (en) * | 1987-05-12 | 1988-11-17 | Automobiles Peugeot | Supervisory device for the pressure of an oil pump driven by the transmission of an automotive vehicle |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1364748A1 (en) * | 2002-05-22 | 2003-11-26 | Atlas Copco Tools Ab | Portable power tool with grease lubricated angle gear drive |
EP1364747A2 (en) * | 2002-05-22 | 2003-11-26 | Atlas Copco Tools Ab | Portable power tool with rotation motor and grease lubrificated angle drive |
EP1364747A3 (en) * | 2002-05-22 | 2006-10-18 | Atlas Copco Tools Ab | Portable power tool with rotation motor and grease lubrificated angle drive |
Also Published As
Publication number | Publication date |
---|---|
DE69801293D1 (en) | 2001-09-13 |
DE69801293T2 (en) | 2002-07-04 |
SE509564C2 (en) | 1999-02-08 |
JPH10329055A (en) | 1998-12-15 |
EP0861997B1 (en) | 2001-08-08 |
US6109366A (en) | 2000-08-29 |
JP4404387B2 (en) | 2010-01-27 |
SE9700579D0 (en) | 1997-02-19 |
SE9700579L (en) | 1998-08-20 |
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